Lower North Platte River Basin (9)
January 2002

Snow
SWE for the North Platte River basin in Wyoming averages 64 percent of normal (71 % of last year). The Sweetwater
drainage SWE is currently 87 percent (101 percent of last year). Deer and LaPrele Creek SWE is 52 percent of average
(47 percent of last year. SWE for the North Platte above the Laramie River drainage is 66 percent of average (73 % of
last year). SWE for the Laramie River above the mouth is 57 percent of average (65 % of last year). SWE for the
Laramie River above Laramie is 60 percent of average (69 % of last year). SWE for the Little Laramie River is 50
percent of average (57 percent of last year). For more information see Basin Summary of Snow Courses at beginning
of report.

Precipitation
Of the 14 reporting stations, percentages for the month range from 0 to 113. December precipitation for the basin was
49 percent of average (42 percent of last year). The water year-to-date precipitation for the basin is currently 82 percent
of average (96 percent of last year). Year to date percentages range from 61 to 167.

Streamflow
Yields from 37 to 66 percent are expected in the basin during the forecast period. The following yields are based on the
fifty percent chance probability runoff for the April through September forecast period. The Sweetwater near Alcova is
forecast to yield about 38,000 acre-feet (48 percent of average). Deer Creek at Glenrock is expected to yield about 37
percent of average (15,000 acre-feet). LaPrele Creek above the reservoir is estimated to yield 40 percent of average
(9,500 acre-feet). North Platte River below Guernsey Reservoir is expected to yield about 49 percent of normal
(490,000 acre-feet), and below Glendo Reservoir is anticipated to yield about 49 percent of average (480,000 acre-feet).
Laramie River near Woods should yield about 66 percent of average (89,000 acre-feet). The Little Laramie near
Filmore should produce about 42,000 acre-feet (66 percent of average).